Self-loading magnesium flash-lamp



(No Model.)

D. H. HOUSTON. SELF LOADING MAGNESIUM FLASH LAMP.

No. 446,918. Patented Feb. 24,1891.

UNITED STATES PATENT OFFICE.

DAVID II. HOUSTON, OF HUNTER, NORTH DAKOTA.

SELF-LOADING MAGNESIUM FLASH-LAMP.

SPECIFICATION forming part of Letters Patent No. 446,918, dated February24, 1891.

Application filed April 21, 1890. Serial No- 348,914. (No model.)

To all whom it may concern:

Be it known that 1, DAVID H. HOUSTON, a citizen of theUnited States,residingat Hunter, in the county of Cass and State of North Dakota, haveinvented a new and Improved Self Loading Magnesium Flash -Lamp forPhotographic Purposes, of which the following is a specification.

Theobject of my invention is to produce an eitective and convenientself-loading lamp that will make a strong actinic light for photographicuse.

Figure 1 is an exterior elevation of the entire lamp. Fig. 2 is avertical section of the lamp. Fig. 3 is a vertical section of the lampand interior parts when drawn out of the powder-magazine A. Fig.4 isavertical view of the stationary valve L, the stationary hollow tube 0,and the arm H.

Similar letters refer to similar parts in the several views.

The wick T, having been saturated with alcohol or any other suitablefluid that will burn, will, when lighted, produce a conical flame aboveand cover the central air-pan F, which air-pan F should have aperturesin the outer rim of its bottom to admit air for the better combustion ofthe flame from the wick 'l' or the flame from the inclined gas-jets P P.

A quantity of magnesium-powder having been placed through the aperture Ninto the powder-magazine A, it is prevented from falling down into thepowder-holding cylinderV by the closed valve K on the hollow valvestemJ. By turning the lamp until the point Y comes to the point Z the valveK will be turned until the apertureX is opposite a similar aperture inthe stationary part of the valve L, and by a shake of the lamp thepowder from the magazine A will fall down to fill the cylinder V as highas the position of the valve K will admit, when a back turn of the lampuntil the point Y comes to the point Y will close the valve again. By apressure of the hand on the collapsible bulb D the air from the interiorof the bulb is forced through the air-passage XV, causing themagnesiumpowder from the powder-cylinder V to be blown upward throughthe hollow valve-stem J and in a dust-cloud into the flame from the wickT or the flame from the gas-jets P P, at the option of the operator, andproducing a very powerful actinic light for photographic purposes.

Vhen saturating the wick with a fluid that will burn, the inside lid Sof the air-pan F should be kept on to prevent any of the fluid fromrunning down through the hollow tube J into the powder-cylinder V.

During the use of the lamp both the covers der-magazine A, the cylinderV, and the revolving valve K.

2. In combination with a magnesium flashlamp, the passage \V, thecone-shaped powder holder V, the cylinder V, the revolving valve K, andthe hollow revolving valve-stem J.

3. \Vith a magnesium lamp, the combination of the stationary valve L,the revolving valve K, and the hollow revolving valvestem J.

4. With a magnesium-lamp, the powdermagazine A, the rib I, the arm H,and the sta tionary hollow tube 0.

5. lVith a magnesium-lamp, the combination of the cock M, the apertureN, the powder-magazine A, the cylinder V, and an airpassage \V, havingits inlet higher than its outlet.

6. W'ithamagnesium-lamp,the combination of the powder-magazine A, thepowder-holding cylinder V, a valve K, the cone-shaped powder-holder V,and an air-passage V.

7. In combination with a magnesium-lamp,

the air-passage WV, the cone-shaped powder-- holder V, thepowder-cylinder V, and a rubber bulb placed over the lower end of thepowder-magazine A.

8. In combination with a magnesium-lamp, the wick-trough T, the air-panF, with airholes in the outer circle of the bottom of said air-pan, thecylinder B, the cone-bottom U, and the hollow tube J, passing downthrough the powder-magazine A and connecting with a pistonhead K in thepowder-cylinder V.

9. In combination with a magnesiuni-lamp, the outside cover G, theinside cover S, and the revolving cylinder 13, said cylinder adapted torevolve from the point shown at Y to the point shown at Z.

10. In combination with a magnesiuiii-lamp, the Valve K, the hollowvalve-stem J, and the cylinder 13, adjusted to slide up and down in thetop of the powder-magazine A.

11. In combination with amagnesiuni-lamp, the powder-n1agazi11e A andthe Window A fitted with a transparent covering.

12. In combination with a n1agnesiuin-lamp, the rubber bulb I), thepowder-magazine A, and two index-points Y and Z. 15

13. In combination with a magl'lesium-lamp, a powder-n1agazine having anaperture in its outside covered with a transparent material.

DAVID II. HOUS'ION.

Witnesses:

E. Gno. GUTHRIE, II. C. BARBER.

